CN106732591A - A kind of graphene-supported p N-shapeds Cu2O‑TiO2The preparation method of heterojunction nanometer material - Google Patents

A kind of graphene-supported p N-shapeds Cu2O‑TiO2The preparation method of heterojunction nanometer material Download PDF

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CN106732591A
CN106732591A CN201611090700.XA CN201611090700A CN106732591A CN 106732591 A CN106732591 A CN 106732591A CN 201611090700 A CN201611090700 A CN 201611090700A CN 106732591 A CN106732591 A CN 106732591A
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tio
graphene
supported
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nanometer material
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王秉
林伟明
万军民
彭志勤
胡智文
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Zhejiang University of Technology ZJUT
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Zhejiang University of Technology ZJUT
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/70Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
    • B01J23/72Copper
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J35/00Catalysts, in general, characterised by their form or physical properties
    • B01J35/30Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
    • B01J35/396Distribution of the active metal ingredient
    • B01J35/397Egg shell like

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  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
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  • Inorganic Compounds Of Heavy Metals (AREA)
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Abstract

The invention discloses a kind of graphene-supported p N-shapeds Cu2O‑TiO2The preparation method of heterojunction nanometer material, belongs to nano composite material preparing technical field, disperses graphene in deionized water ultrasound and is configured to solution A, and butyl titanate is dissolved in into absolute ethyl alcohol is made B solution, by Cu (Ac)2·H2O is made C solution in being dissolved in absolute ethyl alcohol, and graphene-supported p N-shapeds Cu is prepared by hydro-thermal method2O‑TiO2Heterojunction nanometer material, preparation method of the present invention is simple, low cost, is conducive to industrialized production, and prepared ternary complex is applied to gas sensing field, and extremely excellent performance is shown in gas sensing.

Description

A kind of graphene-supported p-n junction Cu2O-TiO2The preparation method of heterojunction nanometer material
Technical field
The present invention relates to a kind of preparation method of heterojunction nanometer material, more specifically say, be related to a kind of Graphene to bear Carry p-n junction Cu2O-TiO2The preparation method of heterojunction nanometer material.
Background technology
The composite that binary metal oxide is supported on graphenic surface simultaneously is repeatedly reported recently.Using inhomogeneity The performances such as the p-n junction characteristic of semiconductor and the light of its own, electricity, magnetic of type metal oxide, make composite in different applications Field shows more excellent performance.The material of heterojunction structure is modified on reduced graphene surface, and the composite is in gas Extremely excellent performance is shown in body sensing, the CuO-ZnO p-n junction structures of formation are served mainly in sensing process Effect.The research that binary metal oxide is applied to gas sensing is also relatively fewer, finds the excellent p-n junction of sensing capabilities and is combined Material, and modified in grapheme material be gas sensing field new problem.
At present, because metal oxide has the advantages that non-toxic, low cost, the senser element size of making are small, metal Application of the oxide-based nanomaterial in gas sensing gets the attention.Research discovery, the compound gold with p-n junction structure Category oxide has preferable room temperature air sensing capabilities, but in bulk resistor, response and poor performance in terms of resume speed, A kind of investigation of materials that can obtain preferably sensing effect is the inexorable trend for developing.
The content of the invention
It is an object of the invention to overcome the deficiencies in the prior art, there is provided with bulk resistor, response and resume speed A kind of graphene-supported p-n junction Cu of the excellent grade technical characterstic of aspect2O-TiO2The preparation method of heterojunction nanometer material.
A kind of graphene-supported p-n junction Cu that the present invention is provided2O-TiO2The preparation method of heterojunction nanometer material, it is adopted Use following steps:
1) by mass fraction, 10-30 parts of deionized water is taken, 5-15 parts of graphite oxide is well mixed, and ultrasonic 0.5-1.5h matches somebody with somebody Solution A is made, 10-30 parts of absolute ethyl alcohol is taken, 0.2-0.6 parts of butyl titanate mixing is stirred 0.5-1.5h, be configured to B solution, take 10-30 parts of absolute ethyl alcohol, 0.1-0.5 parts of Cu (Ac)2·H2O mixes, and stirs 0.5-1.5h, is configured to C solution;
2) take step 1) obtain B, C solution be slowly added in solution A successively, ultrasonic 10-40min, stir 2-4h, obtain Mixture;
3) step 2 is taken) mixture that obtains, it is acidified with hydrochloric acid that concentration is 0.1-0.5mol/L until pH value is 1-5, magnetic Power stirring 2-4h is transferred in the reactor of polytetrafluoroethyllining lining, and 5-15h is incubated under the conditions of 150-200 DEG C, is then centrifuged for water Washing bakees 18-36h to neutrality under the conditions of 40-80 DEG C, obtains graphene-supported p-n junction Cu2O-TiO2Hetero-junctions nanometer material Material.
As a kind of preferred, with graphene-supported p-n junction Cu2O-TiO2On the basis of heterojunction nanometer material gross weight, Cu2O、TiO2Account for graphene-supported p-n junction Cu respectively with graphite oxide2O-TiO2The 40- of heterojunction nanometer material gross weight 60%th, 30-50%, 5-15%.
As a kind of preferred, the graphene-supported p-n junction Cu2O-TiO2Heterojunction nanometer material is applied to gas sensing Field.
A kind of graphene-supported p-n junction Cu that the present invention is provided2O-TiO2The preparation method of heterojunction nanometer material, it is adopted Use following steps:
1) by mass fraction, 20 parts of deionized waters are taken, 10 parts of graphite oxides are well mixed, and ultrasonic 1h is configured to solution A, 20 parts of absolute ethyl alcohols are taken, 0.4 part of butyl titanate mixing is stirred 1h, is configured to B solution, takes 20 parts of absolute ethyl alcohols, 0.3 part of Cu (Ac)2·H2O mixes, and stirs 1h, is configured to C solution;
2) take step 1) obtain B, C solution be slowly added in solution A successively, ultrasonic 25min, stir 3h, mixed Thing;
3) step 2 is taken) mixture that obtains, it is acidified with hydrochloric acid that concentration is 0.3mol/L until pH value is 3, magnetic agitation 3h is transferred in the reactor of polytetrafluoroethyllining lining, and 10h is incubated under the conditions of 175 DEG C, water washing to neutrality is then centrifuged for, 60 22h is bakeed under the conditions of DEG C, graphene-supported p-n junction Cu is obtained2O-TiO2Heterojunction nanometer material.
As a kind of preferred, with graphene-supported p-n junction Cu2O-TiO2On the basis of heterojunction nanometer material gross weight, Cu2O、TiO2Account for graphene-supported p-n junction Cu respectively with graphite oxide2O-TiO2Heterojunction nanometer material gross weight:50%th, 40%th, 10%, the graphene-supported p-n junction Cu2O-TiO2Heterojunction nanometer material is applied to gas sensing field.
Profitable effect of the invention:By Cu2O-TiO2The material of heterojunction structure is modified in graphenic surface, with height Activity, detectable gas;Preparation method is simple, low cost, is conducive to industrialized production;In bulk resistor, response and recovery speed The aspect excellent performances such as degree;Preparation process green pollution-free, processing safety is high;With preferable room temperature air sensitivities Can, it is adaptable to gas sensing field.
Specific embodiment
Below in conjunction with specific embodiment, the present invention will be described in detail:
A kind of graphene-supported p-n junction Cu of the present invention2O-TiO2The preparation method of heterojunction nanometer material, uses Following steps:
1) by mass fraction, 10-30 parts of deionized water is taken, 5-15 parts of graphite oxide is well mixed, and ultrasonic 0.5-1.5h matches somebody with somebody Solution A is made, 10-30 parts of absolute ethyl alcohol is taken, 0.2-0.6 parts of butyl titanate mixing is stirred 0.5-1.5h, be configured to B solution, take 10-30 parts of absolute ethyl alcohol, 0.1-0.5 parts of Cu (Ac)2·H2O mixes, and stirs 0.5-1.5h, is configured to C solution;
2) take step 1) obtain B, C solution be slowly added in solution A successively, ultrasonic 10-40min, stir 2-4h, obtain Mixture;
3) step 2 is taken) mixture that obtains, it is acidified with hydrochloric acid that concentration is 0.1-0.5mol/L until pH value is 1-5, magnetic Power stirring 2-4h is transferred in the reactor of polytetrafluoroethyllining lining, and 5-15h is incubated under the conditions of 150-200 DEG C, is then centrifuged for water Washing bakees 18-36h to neutrality under the conditions of 40-80 DEG C, obtains graphene-supported p-n junction Cu2O-TiO2Hetero-junctions nanometer material Material.
As a kind of preferred embodiment, with graphene-supported p-n junction Cu2O-TiO2Heterojunction nanometer material gross weight is Benchmark, Cu2O、TiO2Account for graphene-supported p-n junction Cu respectively with graphite oxide2O-TiO2Heterojunction nanometer material gross weight 40-60%, 30-50%, 5-15%.
As a kind of preferred embodiment, the graphene-supported p-n junction Cu2O-TiO2Heterojunction nanometer material is applied to Gas sensing field.
Embodiment 1:A kind of graphene-supported p-n junction Cu of the present invention2O-TiO2The preparation side of heterojunction nanometer material Method, using following steps:
1) by mass fraction, 10 parts of deionized waters are taken, 5 parts of graphite oxides are well mixed, and ultrasonic 0.5h is configured to solution A, 10 parts of absolute ethyl alcohols are taken, 0.2 part of butyl titanate mixing is stirred 0.5h, is configured to B solution, takes 10 parts of absolute ethyl alcohols, 0.1 part of Cu (Ac)2·H2O mixes, and stirs 0.5h, is configured to C solution;
2) take step 1) obtain B, C solution be slowly added in solution A successively, ultrasonic 10min, stir 2h, mixed Thing;
3) step 2 is taken) mixture that obtains, it is acidified with hydrochloric acid that concentration is 0.1mol/L until pH value is 1, magnetic agitation 2h is transferred in the reactor of polytetrafluoroethyllining lining, and 5h is incubated under the conditions of 150 DEG C, water washing to neutrality is then centrifuged for, 40 18h is bakeed under the conditions of DEG C, obtains being applied to the graphene-supported p-n junction Cu in gas sensing field2O-TiO2Hetero-junctions nanometer material Material, with graphene-supported p-n junction Cu2O-TiO2On the basis of heterojunction nanometer material gross weight, Cu2O、TiO2With graphite oxide point Graphene-supported p-n junction Cu is not accounted for2O-TiO240%, 30%, the 5% of heterojunction nanometer material gross weight.
A kind of graphene-supported p-n junction Cu of embodiment 22O-TiO2The preparation method of heterojunction nanometer material, it is using as follows Step:
1) by mass fraction, 20 parts of deionized waters are taken, 10 parts of graphite oxides are well mixed, and ultrasonic 1h is configured to solution A, 20 parts of absolute ethyl alcohols are taken, 0.4 part of butyl titanate mixing is stirred 1h, is configured to B solution, takes 20 parts of absolute ethyl alcohols, 0.3 part of Cu (Ac)2·H2O mixes, and stirs 1h, is configured to C solution;
2) take step 1) obtain B, C solution be slowly added in solution A successively, ultrasonic 25min, stir 3h, mixed Thing;
3) step 2 is taken) mixture that obtains, it is acidified with hydrochloric acid that concentration is 0.3mol/L until pH value is 3, magnetic agitation 3h is transferred in the reactor of polytetrafluoroethyllining lining, and 10h is incubated under the conditions of 175 DEG C, water washing to neutrality is then centrifuged for, 60 22h is bakeed under the conditions of DEG C, obtains being applied to the graphene-supported p-n junction Cu in gas sensing field2O-TiO2Hetero-junctions nanometer material Material, with graphene-supported p-n junction Cu2O-TiO2On the basis of heterojunction nanometer material gross weight, Cu2O、TiO2With graphite oxide point Graphene-supported p-n junction Cu is not accounted for2O-TiO2Heterojunction nanometer material gross weight:45%th, 35%, 10%, the Graphene is born Carry p-n junction Cu2O-TiO2Heterojunction nanometer material.
Embodiment 3:A kind of graphene-supported p-n junction Cu2O-TiO2The preparation method of heterojunction nanometer material, it is using such as Lower step:
1) by mass fraction, 30 parts of deionized waters are taken, 15 parts of graphite oxides are well mixed, and ultrasonic 1.5h is configured to A molten Liquid, takes 30 parts of absolute ethyl alcohols, and 0.6 part of butyl titanate mixing is stirred 1.5h, is configured to B solution, takes 30 parts of absolute ethyl alcohols, 0.5 part Cu(Ac)2·H2O mixes, and stirs 1.5h, is configured to C solution;
2) take step 1) obtain B, C solution be slowly added in solution A successively, ultrasonic 40min, stir 4h, mixed Thing;
3) step 2 is taken) mixture that obtains, it is acidified with hydrochloric acid that concentration is 0.5mol/L until pH value is 5, magnetic agitation 4h is transferred in the reactor of polytetrafluoroethyllining lining, and 15h is incubated under the conditions of 200 DEG C, water washing to neutrality is then centrifuged for, 80 36h is bakeed under the conditions of DEG C, obtains being applied to the graphene-supported p-n junction Cu in gas sensing field2O-TiO2Hetero-junctions nanometer material Material, with graphene-supported p-n junction Cu2O-TiO2On the basis of heterojunction nanometer material gross weight, Cu2O、TiO2With graphite oxide point Graphene-supported p-n junction Cu is not accounted for2O-TiO255%, 35%, the 5% of heterojunction nanometer material gross weight.
Embodiment of the present invention is not limited to the above 3 embodiment, by foregoing disclosed number range, With regard to carrying out any replacement in specific embodiment, such that it is able to obtain numerous embodiment, this is not enumerated.

Claims (5)

1. a kind of graphene-supported p-n junction Cu2O-TiO2The preparation method of heterojunction nanometer material, it is characterised in that the preparation side Method uses following steps:
1) by mass fraction, 10-30 parts of deionized water is taken, 5-15 parts of graphite oxide is well mixed, and ultrasonic 0.5-1.5h is configured to Solution A, takes 10-30 parts of absolute ethyl alcohol, and 0.2-0.6 parts of butyl titanate mixing is stirred 0.5-1.5h, be configured to B solution, takes 10- 30 parts of absolute ethyl alcohols, 0.1-0.5 parts of Cu (Ac)2·H2O mixes, and stirs 0.5-1.5h, is configured to C solution;
2) take step 1) obtain B, C solution be slowly added in solution A successively, ultrasonic 10-40min, stir 2-4h, mixed Thing;
3) step 2 is taken) mixture that obtains, it is acidified with hydrochloric acid that concentration is 0.1-0.5mol/L until pH value is 1-5, magnetic force is stirred Mix 2-4h to be transferred in the reactor of polytetrafluoroethyllining lining, 5-15h is incubated under the conditions of 150-200 DEG C, be then centrifuged for water washing To neutral, 18-36h is bakeed under the conditions of 40-80 DEG C, obtain graphene-supported p-n junction Cu2O-TiO2Heterojunction nanometer material.
2. a kind of graphene-supported p-n junction Cu according to claim 12O-TiO2The preparation method of heterojunction nanometer material, It is characterized in that:With graphene-supported p-n junction Cu2O-TiO2On the basis of heterojunction nanometer material gross weight, Cu2O、TiO2And oxygen Graphite accounts for graphene-supported p-n junction Cu respectively2O-TiO240-60%, 30-50%, 5- of heterojunction nanometer material gross weight 15%.
3. a kind of graphene-supported p-n junction Cu according to claim 12O-TiO2The preparation method of heterojunction nanometer material, It is characterized in that:The graphene-supported p-n junction Cu2O-TiO2Heterojunction nanometer material is applied to gas sensing field.
4. a kind of graphene-supported p-n junction Cu2O-TiO2The preparation method of heterojunction nanometer material, it is characterised in that the preparation side Method uses following steps:
1) by mass fraction, 20 parts of deionized waters are taken, 10 parts of graphite oxides are well mixed, and ultrasonic 1h is configured to solution A, takes 20 Part absolute ethyl alcohol, 0.4 part of butyl titanate mixing, stirs 1h, is configured to B solution, takes 20 parts of absolute ethyl alcohols, 0.3 part of Cu (Ac)2· H2O mixes, and stirs 1h, is configured to C solution;
2) take step 1) obtain B, C solution be slowly added in solution A successively, ultrasonic 25min, stir 3h, obtain mixture;
3) step 2 is taken) mixture that obtains, it is acidified with hydrochloric acid that concentration is 0.3mol/L until pH value is 3, magnetic agitation 3h turns Enter in the reactor of polytetrafluoroethyllining lining, 10h is incubated under the conditions of 175 DEG C, be then centrifuged for water washing to neutrality, in 60 DEG C of bars 22h is bakeed under part, graphene-supported p-n junction Cu is obtained2O-TiO2Heterojunction nanometer material.
5. a kind of graphene-supported p-n junction Cu according to claim 42O-TiO2The preparation method of heterojunction nanometer material, It is characterized in that:With graphene-supported p-n junction Cu2O-TiO2On the basis of heterojunction nanometer material gross weight, Cu2O、TiO2And oxygen Graphite accounts for graphene-supported p-n junction Cu respectively2O-TiO2Heterojunction nanometer material gross weight:45%th, 35%, 10%, it is described Graphene-supported p-n junction Cu2O-TiO2Heterojunction nanometer material is applied to gas sensing field.
CN201611090700.XA 2016-11-30 2016-11-30 A kind of graphene-supported p N-shapeds Cu2O‑TiO2The preparation method of heterojunction nanometer material Pending CN106732591A (en)

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CN107557810A (en) * 2017-08-17 2018-01-09 江西科技学院 A kind of Z-type hetero-junctions Cu2O_ graphenes _ α Fe2O3Nano-tube array photochemical catalyst and its preparation
CN108355654A (en) * 2018-01-18 2018-08-03 三明学院 A kind of graphene-based Cu/Cu2O/TiO2Composite visible light catalyst and preparation method thereof
CN112326735A (en) * 2020-10-14 2021-02-05 滕州创感电子科技有限公司 Preparation method of room-temperature semiconductor gas sensing material and sensor
CN115364855A (en) * 2022-07-29 2022-11-22 淮北师范大学 Preparation method of cuprous oxide/titanium dioxide/graphene oxide ternary nano compound

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107557810A (en) * 2017-08-17 2018-01-09 江西科技学院 A kind of Z-type hetero-junctions Cu2O_ graphenes _ α Fe2O3Nano-tube array photochemical catalyst and its preparation
CN108355654A (en) * 2018-01-18 2018-08-03 三明学院 A kind of graphene-based Cu/Cu2O/TiO2Composite visible light catalyst and preparation method thereof
CN108355654B (en) * 2018-01-18 2021-04-09 三明学院 Graphene-based Cu/Cu2O/TiO2Composite visible light catalyst and preparation method thereof
CN112326735A (en) * 2020-10-14 2021-02-05 滕州创感电子科技有限公司 Preparation method of room-temperature semiconductor gas sensing material and sensor
CN115364855A (en) * 2022-07-29 2022-11-22 淮北师范大学 Preparation method of cuprous oxide/titanium dioxide/graphene oxide ternary nano compound

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